Add emctl handling consul service registry and cookbook of it

[xxx7xxxx]

[codecov-commenter]

Codecov Report

Merging #94 (64edd45) into main (d0aad1e) will decrease coverage by 0.03%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
- Coverage   37.06%   37.03%   -0.04%     
==========================================
  Files          20       20              
  Lines        1972     1974       +2     
==========================================
  Hits          731      731              
- Misses       1118     1120       +2     
  Partials      123      123              

Impacted Files	Coverage Δ
emctl/cmd/client/util/visitor.go	29.79% <0.00%> (-0.31%)	:arrow_down:

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